After more than 14 years maintaining and updating this library on my spare time, I've decided to officially discontinue it and focus my enery on other projects.

When I released NVTT there was very little public information about compression for GPU texture formats. Existing codecs were closed-source, encumbered by patents, and not particularly efficient or high quality. A lot has changed since then. Today most IHVs have their own open source codecs and several companies develop high quality commercial products around texture compression.

NVTT doesn't support the latest formats anymore, many of its codecs are outdated, and it's source code has aged. NVIDIA doesn't support my work in any way, but its users have come to expect that support. In retrospect naming a personal project after my employer was a mistake!

If you are looking for alternative texture compression tools and algorithms I recommend you check these out:

• I still maintain A High Quality SIMD BC1 Encoder.
• Deano Calver supports three tiny libraries that provide support for DDS and KTX file formats, and pixel format conversion.
• stb_image_resize provides polyphase image resize filters that are similar to what NVTT supports.
• Oodle Texture is a suite of commercial RDO texture codecs.
• Binomial is an image and texture compression company that develops Basis a universal texture codec and also has other source codecs.
• NVIDIA Texture Tools exporter is based on a private fork of this project and offers additional GPU accelerated codecs, but it's not open source.
• Intel ISPC Texture Compressor is a set of set of open source SIMD texture codecs that are very fast, but low quality.
• AMD Compressonator offers a wide variety of open source compressors.
• ARM ASTC Encoder is an excellent ASTC encoder.
• Dario Manesku's cube map filtering tool seems like a good alternative for the cube map filtering functions in NVTT.

NVIDIA Texture Tools

The NVIDIA Texture Tools is a collection of image processing and texture manipulation tools, designed to be integrated in game tools and asset processing pipelines.

The primary features of the library are mipmap and normal map generation, format conversion, and DXT compression.

How to build (Windows)

Use the provided Visual Studio 2017 solution project/vc2017/thekla.sln.

How to build (Linux/OSX)

Use cmake and the provided configure script:

$ ./configure
$ make
$ sudo make install

Using NVIDIA Texture Tools

To use the NVIDIA Texture Tools in your own applications you just have to include the following header file:

src/nvtt/nvtt.h

And include the nvtt library in your projects.

The following file contains a simple example that shows how to use the library:

src/nvtt/tools/compress.cpp

Detailed documentation of the API can be found at:

https://github.com/castano/nvidia-texture-tools/wiki/ApiDocumentation